Mazda Factory OBD-II DTC C1194 Code

DTC C1194	DSC continuous operation fault
DETECTION CONDITION	• The PCM receives DSC operation signals from DSC CM while the engine switch is turned to the ON position. If the PCM receives DSC operation signals for longer than the specified time, the PCM determines that the DSC is operating continuously. Note • The DSC CM stops operating itself for protection heat to the solenoid and/or motor (built in DSC HU) if the DSC operates for a long time.
POSSIBLE CAUSE	• Communication error between DSC CM and PCM • DSC CM does not determine vehicle conditions correctly. ― DSC CM malfunction ― DSC related sensor malfunction • The vehicle runs under the road conditions in which DSC operates for a long time. • PCM malfunction

Caution

• While performing the Drive Mode, always operate the vehicle in a safe and lawful manner.

• When the M-MDS is used to observe or monitor system conditions while driving, be sure to have another technician with you, or record the data in the M-MDS using the PID/DATA MONITOR AND RECORD functions and inspect later.

Diagnostic procedure

STEP	INSPECTION		ACTION
1	VERIFY FREEZE FRAME DATA HAS BEEN RECORDED • Has the FREEZE FRAME DATA been recorded?	Yes	Go to the next step.
1		No	Record the FREEZE FRAME DATA on the repair order, then go to the next step.
2	VERIFY RELATED REPAIR INFORMATION AVAILABILITY • Verify related service repair information availability. • Is any related repair information available?	Yes	Perform repair or diagnosis according to the available repair information. If the vehicle is not repaired, go to the next step.
2		No	Go to the next step.
3	VERIFY DSC CM DTC IS RETRIEVED • Retrieve the DSC CM DTC using the M-MDS. • Is any DSC CM DTC retrieved?	Yes	Go to the applicable DTC troubleshooting procedure.
3		No	Go to the next step.
4	INSPECT IF MALFUNCTION IS IN ABS WHEEL SPEED SIGNALS OR ELSEWHERE • Access the following ABS wheel speed sensor (DSC) related PIDs using the M-MDS. ― LF_WSPD ― LR_WSPD ― RF_WSPD ― RR_WSPD • Drive the vehicle on a straight and flat road. • Are there almost the same as the PIDs value of four wheels?	Yes	Go to the next step.
4		No	Inspect the ABS wheel speed sensor, sensor rotor and related wiring harnesses. Service as necessary. Then go to Step 7.
5	INSPECT IF MALFUNCTION IS IN COMBINED SENSOR SIGNALS OR ELSEWHERE • Access the following combined sensors (DSC) related PIDs using the M-MDS. ― YAW_RATE ― LAT_ACC • Drive the vehicle on a straight and flat road. • Are the PIDs values of each combined sensor signal correct?	Yes	Go to the next step.
5		No	Inspect the combined sensor and related wiring harnesses. Service as necessary. Then go to Step 7.
6	INSPECT WHERE MALFUNCTION IS IN STEERING ANGLE SIGNAL OR ELSEWHERE • Access the following steering angle sensor (DSC) related PID using the M-MDS. ― SWA_POS • Drive the vehicle on a straight and flat road. • Is the PID value correct?	Yes	Go to the next step.
6		No	Inspect the steering angle sensor and related wiring harnesses. Service if necessary. Then go to the next step.
7	VERIFY THAT DTC C1194 TROUBLESHOOTING IS COMPLETED • Make sure to reconnect all disconnected connectors. • Clear the DTC from the PCM memory using the M-MDS. • Run the vehicle under the FREEZE FRAME DATA stored condition. • Is the same DTC present?	Yes	Replace the PCM, then go to the next step.
7		No	Go to the next step.
8	VERIFY AFTER REPAIR PROCEDURE • Perform the after repair procedure. • Are any DTCs present?	Yes	Go to the applicable DTC inspection.
8		No	DTC troubleshooting completed.